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ATMEGA1608-XU

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Microchip Tech Pre-ordered MCUs, SSOP-28-208mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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ATMEGA1608-XU

Microchip Tech · Pre-ordered MCUs · SSOP-28-208mil

ATMEGA1608-XU from Microchip Tech, in a SSOP-28-208mil. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 PA7 bidirectional PORTA pin 7 on the AVDD domain, with CLKOUT as special function, alternate USART0 XDIR, SPI0 SS and alternate EVOUTA.
2 PC0 bidirectional PORTC pin 0 with USART1 TxD, alternate SPI0 MOSI, alternate TCA0 WO0, TCB2 WO and CCL LUT1-IN0.
3 PC1 bidirectional PORTC pin 1 with USART1 RxD, alternate SPI0 MISO, alternate TCA0 WO1, alternate TCB3 WO and CCL LUT1-IN1.
4 PC2 bidirectional PORTC pin 2 with TWI0 (alternate SDA host), USART1 XCK, alternate SPI0 SCK, alternate TCA0 WO2, EVOUTC and CCL LUT1-IN2.
5 PC3 bidirectional PORTC pin 3 with TWI0 (alternate SCL host), USART1 XDIR, alternate SPI0 SS, alternate TCA0 WO3 and CCL LUT1-OUT.
6 PD0 bidirectional PORTD pin 0 with ADC0 input AIN0, alternate TCA0 WO0 and CCL LUT2-IN0.
7 PD1 bidirectional PORTD pin 1 with ADC0 input AIN1, AC0 positive input P3, alternate TCA0 WO1 and CCL LUT2-IN1.
8 PD2 bidirectional PORTD pin 2 with ADC0 input AIN2, AC0 positive input P0, alternate TCA0 WO2, EVOUTD and CCL LUT2-IN2.
9 PD3 bidirectional PORTD pin 3 with ADC0 input AIN3, AC0 negative input N0, alternate TCA0 WO3 and CCL LUT2-OUT.
10 PD4 bidirectional PORTD pin 4 with ADC0 input AIN4, AC0 positive input P1 and alternate TCA0 WO4.
11 PD5 bidirectional PORTD pin 5 with ADC0 input AIN5, AC0 negative input N1 and alternate TCA0 WO5.
12 PD6 bidirectional PORTD pin 6 with ADC0 input AIN6, AC0 positive input P2 and alternate CCL LUT2-OUT.
13 PD7 bidirectional PORTD pin 7 with external reference input VREFA, ADC0 input AIN7, AC0 negative input N2 and alternate EVOUTD.
14 AVDD power_in Analog-domain input supply powering the GPIO pins on the AVDD power domain (PA and PD pins).
15 GND power_in Ground.
16 PF0 bidirectional PORTF pin 0 with crystal oscillator pin TOSC1, USART2 TxD, alternate TCA0 WO0 and CCL LUT3-IN0.
17 PF1 bidirectional PORTF pin 1 with crystal oscillator pin TOSC2, USART2 RxD, alternate TCA0 WO1 and CCL LUT3-IN1.
18 PF6 bidirectional PORTF pin 6 that serves as the active-low RESET pin (or GPIO when RSTPINCFG fuse selects GPIO), with alternate USART2 XCK and alternate CCL LUT3-OUT.
19 UPDI bidirectional Unified Program and Debug Interface pin used for programming and debug.
20 VDD power_in Input supply for the digital domain; device operates at 1.8-5.5V.
21 GND power_in Ground.
22 PA0 bidirectional PORTA pin 0 with external clock input EXTCLK, USART0 TxD, TCA0 WO0 and CCL LUT0-IN0.
23 PA1 bidirectional PORTA pin 1 with USART0 RxD, TCA0 WO1 and CCL LUT0-IN1.
24 PA2 bidirectional PORTA pin 2 with TWI0 SDA (host), USART0 XCK, TCA0 WO2, TCB0 WO, EVOUTA and CCL LUT0-IN2.
25 PA3 bidirectional PORTA pin 3 with TWI0 SCL (host), USART0 XDIR, TCA0 WO3, TCB1 WO and CCL LUT0-OUT.
26 PA4 bidirectional PORTA pin 4 with alternate USART0 TxD, SPI0 MOSI and TCA0 WO4.
27 PA5 bidirectional PORTA pin 5 with alternate USART0 RxD, SPI0 MISO and TCA0 WO5.
28 PA6 bidirectional PORTA pin 6 with alternate USART0 XCK, SPI0 SCK and alternate CCL LUT0-OUT.

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package SSOP-28-208mil
Category Embedded Processors & Controllers
Pins 28

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Supply Voltage VDD 1.8 5.5 V ATmega1608-XU ordering table supply voltage 520
Operating Temperature Range -40 85 °C ATmega1608-XU ordering table temperature range 520
Max. CPU Speed 20 MHz ATmega1608-XU ordering table 520

CAD (KiCad official)

  • Symbol: ATMEGA1608-XU
  • Footprint: Package_SO:SSOP-28_5.3x10.2mm_P0.65mm
  • 3D model: SSOP-28-208mil (KiCad packages3D, STEP)
  • 3D model files: atmega1608-xu-etched.step / atmega1608-xu-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); atmega1608-xu.step / atmega1608-xu.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Microchip Tech datasheet (552 pp, sha256 e4bbeee766cda6b4, retrieved 2026-10-23, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF